Hurter and Driffield Actinograph. Small mahogany box containing exposure calculator, slide rule type. Scales for plate speed: 0.5-300 H&D. Exposure time: 0.05-60secs. Aperture: f/2.8-65 52 degrees 30' 0".
- Photographic Technology
- Object Number:
overall (closed): 72 mm x 114 mm x 34 mm,
- measuring device
- light measuring device
- The Kodak Collection at the National Media Museum, Bradford
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